Abstract
Studies were conducted at three locations in North Carolina in 2004 to evaluate density-dependent effects of glufosinate-resistant (GUR) corn on GUR cotton growth and lint yield. GUR corn was taller than GUR cotton as early as 11 d after planting, depending on location. A GUR corn density of 5.25 plant/m of crop row reduced late-season cotton height by 38, 43, and 43% at Clayton, Lewiston-Woodville, and Rocky Mount, NC, respectively, compared with weed-free cotton height. GUR corn dry biomass per meter of crop row and GUR corn seed biomass per meter of crop row decreased linearly with increasing GUR corn density at all locations. The relationship between GUR corn density and GUR cotton yield loss was described by the rectangular hyperbola model with the asymptote (a) constrained to 100% maximum yield loss. The estimated coefficient i (yield loss per unit density as density approaches zero) was 7, 5, and 6 at Clayton, Lewiston-Woodville, and Rocky Mount, respectively. Percentage of GUR cotton lint yield loss increased 4, 5, and 8 percentage points at Clayton, Lewiston-Woodville, and Rocky Mount, respectively, with each 500 g increase in weed biomass/m of crop row. The examined GUR corn densities had a significant effect on cotton yield but not as significant as many other problematic grass and broadleaf weeds.Nomenclature: Glufosinate, corn, Zea mays L. ‘Pioneer 34A55LL’ ZEAMX, cotton, Gossypium hirsutum L., ‘FM 958LL’
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Claims 13
Claim · model-written summary
Volunteer corn was taller than cotton as early as 11 days after planting, depending on location.
Verbatim
e0“GUR corn was taller than GUR cotton as early as 11 d after planting, depending on location.”
Claim · model-written summary
Corn at 5.25 plants per metre reduced cotton height 38% at Clayton.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- GUR corn density of 5.25 plant/m of crop rowe0
- Interactor
- GUR corne0weed
- Outcome
- late-season cotton heighte0
- Direction
- reducede0
- Value
- 38e0
- Comparator
- weed-free cottone0
- Setting
- Claytone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A GUR corn density of 5.25 plant/m of crop row reduced late-season cotton height by 38, 43, and 43% at Clayton, Lewiston-Woodville, and Rocky Mount, NC, respectively, compared with weed-free cotton height.”
Claim · model-written summary
Corn at 5.25 plants per metre reduced cotton height 43% at Lewiston-Woodville.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- GUR corn density of 5.25 plant/m of crop rowe0
- Interactor
- GUR corne0weed
- Outcome
- late-season cotton heighte0
- Direction
- reducede0
- Value
- 43e0
- Comparator
- weed-free cottone0
- Setting
- Lewiston-Woodvillee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A GUR corn density of 5.25 plant/m of crop row reduced late-season cotton height by 38, 43, and 43% at Clayton, Lewiston-Woodville, and Rocky Mount, NC, respectively, compared with weed-free cotton height.”
Claim · model-written summary
Corn at 5.25 plants per metre reduced cotton height 43% at Rocky Mount.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- GUR corn density of 5.25 plant/m of crop rowe0
- Interactor
- GUR corne0weed
- Outcome
- late-season cotton heighte0
- Direction
- reducede0
- Value
- 43e0
- Comparator
- weed-free cottone0
- Setting
- Rocky Mounte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A GUR corn density of 5.25 plant/m of crop row reduced late-season cotton height by 38, 43, and 43% at Clayton, Lewiston-Woodville, and Rocky Mount, NC, respectively, compared with weed-free cotton height.”
Claim · model-written summary
Volunteer corn dry and seed biomass per crop-row metre declined linearly as corn density rose at all locations.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- increasing GUR corn densitye0
- Interactor
- GUR corne0weed
- Outcome
- GUR corn dry biomass per meter of crop row and GUR corn seed biomass per meter of crop rowe0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GUR corn dry biomass per meter of crop row and GUR corn seed biomass per meter of crop row decreased linearly with increasing GUR corn density at all locations.”
t0“Cotton”
Claim · model-written summary
A rectangular hyperbola described corn density versus cotton yield loss with 100% constrained maximum loss.
Verbatim
e0“The relationship between GUR corn density and GUR cotton yield loss was described by the rectangular hyperbola model with the asymptote (a) constrained to 100% maximum yield loss.”
Claim · model-written summary
Estimated initial yield loss coefficient was 7 at Clayton.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- coefficient i (yield loss per unit density as density approaches zero)e0
- Value
- 7e0
- Setting
- Claytone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The estimated coefficient i (yield loss per unit density as density approaches zero) was 7, 5, and 6 at Clayton, Lewiston-Woodville, and Rocky Mount, respectively.”
t0“Cotton”
Claim · model-written summary
Estimated initial yield loss coefficient was 5 at Lewiston-Woodville.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- coefficient i (yield loss per unit density as density approaches zero)e0
- Value
- 5e0
- Setting
- Lewiston-Woodvillee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The estimated coefficient i (yield loss per unit density as density approaches zero) was 7, 5, and 6 at Clayton, Lewiston-Woodville, and Rocky Mount, respectively.”
t0“Cotton”
Claim · model-written summary
Estimated initial yield loss coefficient was 6 at Rocky Mount.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- coefficient i (yield loss per unit density as density approaches zero)e0
- Value
- 6e0
- Setting
- Rocky Mounte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The estimated coefficient i (yield loss per unit density as density approaches zero) was 7, 5, and 6 at Clayton, Lewiston-Woodville, and Rocky Mount, respectively.”
t0“Cotton”
Claim · model-written summary
Cotton lint yield loss rose 4 percentage points per 500 g weed biomass at Clayton.
Verbatim
e0“Percentage of GUR cotton lint yield loss increased 4, 5, and 8 percentage points at Clayton, Lewiston-Woodville, and Rocky Mount, respectively, with each 500 g increase in weed biomass/m of crop row.”
t0“Corn”
e1“GUR corn was taller than GUR cotton as early as 11 d after planting, depending on location.”
Claim · model-written summary
Cotton lint yield loss rose 5 percentage points per 500 g weed biomass at Lewiston-Woodville.
Verbatim
e0“Percentage of GUR cotton lint yield loss increased 4, 5, and 8 percentage points at Clayton, Lewiston-Woodville, and Rocky Mount, respectively, with each 500 g increase in weed biomass/m of crop row.”
Claim · model-written summary
Cotton lint yield loss rose 8 percentage points per 500 g weed biomass at Rocky Mount.
Verbatim
e0“Percentage of GUR cotton lint yield loss increased 4, 5, and 8 percentage points at Clayton, Lewiston-Woodville, and Rocky Mount, respectively, with each 500 g increase in weed biomass/m of crop row.”
Claim · model-written summary
The tested volunteer corn densities significantly affected cotton yield.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- GUR corn densitiese0
- Interactor
- GUR corne0weed
- Outcome
- cotton yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The examined GUR corn densities had a significant effect on cotton yield but not as significant as many other problematic grass and broadleaf weeds.”
The same questions in other papers
Zea mays subsp. mays · yield · Gossypium hirsutum (cotton)Positive and negative results
2 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
7 papers more in this group
See all 11 papers →Zea mays subsp. mays · growth · Gossypium hirsutum (cotton)Results agree
2 papers in the same direction as this paper
- negative
- negative
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.